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Real-time recording/reproduction on an information recording medium including a defective region

a technology of information recording and defective region, applied in the direction of digital signal error detection/correction, electronic editing, digital analogue information signals, etc., can solve the problems of significant delay in recording or reproduction process, inability to properly record, and may well be critically problematic in real-time recording and/or smooth, etc., to achieve the effect of minimizing any delay caused by a defective region

Inactive Publication Date: 2005-01-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an information recording medium and method for recording and reproducing data on a sector-by-sector basis. The file structure includes unused space management information identifying defective regions on the medium. The method includes a recording region allocation step, a skip recording step, and a file management information generation step. The invention allows for efficient allocation of recording regions and effective management of defective regions, improving the reliability and accuracy of data recording."

Problems solved by technology

If the sector address which has been read includes an error, the recording cannot occur properly because of inability to identify the right location.
Thus, a significant delay occurs during a recording or reproduction process if any defective regions (e.g., 2623 or 2625) exist in the user area 2621.
However, such delay may well be critically problematic in real-time recording and / or smooth reproduction of data containing digital video and audio data (hereinafter referred to as “AV data”).
For example, problems such as partial loss of AV data, noise generation, inability to perform smooth reproduction, may occur.

Method used

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  • Real-time recording/reproduction on an information recording medium including a defective region
  • Real-time recording/reproduction on an information recording medium including a defective region
  • Real-time recording/reproduction on an information recording medium including a defective region

Examples

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example 2

(EXAMPLE 2)

Next, with reference to the figures, an information recording / reproduction system 1500 according to Example 2 of the present invention for recording or reproducing data on the disk medium shown in FIG. 1 will be described, with respect to its structure and operations.

FIG. 15 is a block diagram illustrating the structure of the information recording / reproduction system 1500 according to Example 2 of the present invention. Hereinafter, the respective elements of the information recording / reproduction system 1500 will be described. The descriptions of those elements which have their counterparts in the information recording / reproduction system 400 shown in FIG. 4 will be omitted.

As shown in FIG. 15, the information recording / reproduction system 1500 includes an upper control apparatus 1510, a disk recording / reproduction drive 1520, a magnetic disk apparatus 450, an AV data output section 460, an AV data input section 470, and an IO / bus 480.

The upper control apparatus 1510 is...

example 3

(EXAMPLE 3)

Next, with reference to the figures, an information recording / reproduction system 3000 according to Example 3 of the present invention for recording or reproducing data on the disk medium shown in FIG. 1 will be described, with respect to its structure and operations.

FIG. 20 is a block diagram illustrating the structure of the information recording / reproduction system 3000 according to Example 3 of the present invention. Hereinafter, the respective elements of the information recording / reproduction system 3000 will be described. The descriptions of those elements which have their counterparts in the information recording / reproduction system 400 shown in FIG. 4 will be omitted.

As shown in FIG. 20, the information recording / reproduction system 3000 includes an upper control apparatus 3010, a disk recording / reproduction drive 3030, a magnetic disk apparatus 450, an AV data output section 460, an AV data input section 470, and an IO / bus 480.

The upper control apparatus 3010 is...

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Abstract

In an information recording medium for recording and reproducing data thereon on a sector-by-sector basis, the recorded data being managed as at least one file by using a file structure, the file structure includes unused space management information for identifying a used region and an unused region. At least one defective region is registered as an unused region in the unused space management information, the at least one defective region being a region on the information recording medium which is incapable of proper reproduction of the recorded data.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to a method for recording / reproducing information on an information recording medium. In particular, the present invention relates to a technique for achieving real-time recording / reproduction of video and / or audio data on an information recording medium including a defective region.2. Description of the Related ArtOptical disks are representative of information recording media having a sector structure. The trend for higher density and larger capacity in recent years has underlined the importance of the reliability of such disks. If a disk includes a sector in which information cannot be properly recorded or reproduced, such a sector is typically registered as a “defective sector” by an optical disk apparatus so that the defective sector will not be used thereafter, and another sector is substituted for that defective sector. This ensures reliability of the disk. Such a defect management function perf...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G11B20/18H04N9/804G11B27/32H04N5/781G11B27/034G11B27/10H04N5/85H04N5/913
CPCG11B20/1217G11B20/1883G11B27/034G11B27/105G11B27/329H04N5/85H04N5/913H04N9/8042H04N2005/91328G11B2020/10888G11B2020/1222G11B2020/1288G11B2220/20H04N5/781G11B20/18G11B7/007
Inventor UEDAGOTOH, YOSHIHOFUKUSHIMA, YOSHIHISAITO, MOTOSHISASAKI, SHINJI
Owner PANASONIC CORP
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